PreparedStatement.addBatch()方法批量插入

Statement和PreparedStatement的区别就不多废话了,直接说PreparedStatement最重要的addbatch()结构的使用.
1.建立链接,(打电话拨号 )
Connection connection =getConnection();
2.不自动 Commit (瓜子不是一个一个吃,全部剥开放桌子上,然后一口舔了)
connection.setAutoCommit(false);
3.预编译SQL语句,只编译一回哦,效率高啊.(发明一个剥瓜子的方法,以后不要总想怎么剥瓜子好.就这样剥.)
PreparedStatement statement = connection.prepareStatement(“INSERT INTO TABLEX VALUES(?, ?)”);
4.来一个剥一个,然后放桌子上
//记录1
statement.setInt(1, 1);
statement.setString(2, “Cujo”);
statement.addBatch();
//记录2
statement.setInt(1, 2);
statement.setString(2, “Fred”);
statement.addBatch();
//记录3
statement.setInt(1, 3);
statement.setString(2, “Mark”);
statement.addBatch();
//批量执行上面3条语句. 一口吞了,很爽
int [] counts = statement.executeBatch();
//Commit it 咽下去,到肚子(DB)里面
connection.commit();

stmt.addBatch(“update TABLE1 set 题目=”盛夏话足部保健1″ where id=”3407″”);
stmt.addBatch(“update TABLE1 set 题目=”夏季预防中暑膳食1″ where id=”3408″”);
stmt.addBatch(“INSERT INTO TABLE1 VALUES(“11″,”12″,”13″,””,””)”);
stmt.addBatch(“INSERT INTO TABLE1 VALUES(“12″,”12″,”13″,””,””)”);
stmt.addBatch(“INSERT INTO TABLE1 VALUES(“13″,”12″,”13″,””,””)”);
stmt.addBatch(“INSERT INTO TABLE1 VALUES(“14″,”12″,”13″,””,””)”);
stmt.addBatch(“INSERT INTO TABLE1 VALUES(“15″,”12″,”13″,””,””)”);
stmt.addBatch(“INSERT INTO TABLE1 VALUES(“16″,”12″,”13″,””,””)”);
stmt.addBatch(“INSERT INTO TABLE1 VALUES(“17″,”12″,”13″,””,””)”);
stmt.addBatch(“INSERT INTO TABLE1 VALUES(“18″,”12″,”13″,””,””)”);

int [] updateCounts=stmt.executeBatch();
cn.commit();
例如:
public static void execteBatch(Connection conn)throws Exception{
String sql1 = “delete from student where id =3 “;
String sql2 = “delete from student where id =5 “;
String sql3 = “delete from student where id =6 “;
String sql4 = “delete from student where id =7 “;
PreparedStatement pstmt = conn.prepareStatement(sql1);
pstmt.addBatch();
pstmt.addBatch(sql2);
pstmt.addBatch(sql3);
pstmt.addBatch(sql4);
pstmt.executeBatch();
};

这个方法真牛逼

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